My neck my wrists ,back problems, and my double vision. It took a long time for me to realize that I'am also one of these guys that needs to do something. I hate sitting doing nothing. I love cutting grass sitting on the tractor with a belly mower , blowing snow with front mount blower etc:[of course a heated cab is a must] is one thing I can do with out having to much pain.Fixing and working on stuff I try to limit the time I spend doing that. It took me quite awhile to learn to slow down and pace myself and do only so much at a time. 2-3 hrs and leave things alone for another day. I've done some work for others but before I even start I always tell them don't expect it done to quick.It might take me a couple days or a week depending on how I feel. This is why when I make and do stuff it seems like it takes me so long. Winter is hardest not much I can do outside the summers are better. I too can only look at the computer so long and it bugs me. I try and pick and chose things that won't bother me to bad and when I do have to do something that I know is going to really make me hurt I try to pick a day that I feel good and give it.Of course I push myself to try and get it completed in that day because I know that I won't beable to tackle much for a few days afterwards.
One thing I find is that especially in the winter we'll get in the car and go for drives around the country just to get out and do something. One other daily thing is I take the dogs for a run everyday in my back property using my Honda Side x side with the homemade heated cab. I also pull a drag around and drag the trails to make it smooth etc:. It's something for me to do rather then sit in the house.This is just some of the things that I do to try and make things more enjoyable. You'll have to figure out something that works best for you.